Rotor setting device for welders



Jan. 26, 1943.

L.. F. KINGERY HOTOR SETTING DEVICE FOR WELDERS Filed Dec. 12. 1941 INVENTOR 3 la 21 F65). 2

jg f 24 l l i a BY LFUCngery imm@ ATTYS Patented Jan. 26, 1943 ROTOR SETTING DEVICE FOR WELDERS Leroy F. Kingery, Stockton, Calif., assignor to Shober Sales, Inc., Stockton, Calif., a corporation of California Application December 12, 1941, Serial No. 422,662

13 Claims. (Cl. 171-119) This invention relates in general to a rotorl setting device for an electric Welder of the type which includes a rotor adapted for rotative adjustment relative to the stator, whereby to control the output of the welder; and in particular the invention comprises a unique form of setting device for a Welder wherein the rotor is mounted for limited axial movement relative to the stator and is normally urged in an axial direction into .1 frictional holding engagement with a holding element disposed in the path of axial movement of said rotor.

The principal object of the present invention is to provide, in a Welder of the type described,

a rotor setting device which includes manually actuated single-control means operative to release the rotor from the frictional holding means, and to then rotate said rotor to selective positions of adjustment relative to the stator.

A further object of the invention is to provide,

in a Welder of the type described, spring means" rwhich normally urges the rotor in an axial direction into frictional engagement with the holding element; there being manually actuated single-control means to counteract the effect of the spring and to then rotate said rotor to selective positions of adjustment relative to the stator.

An additional object of the invention is to provide in an electric Welder which includes a normally locked but releasable rotor, rotor releasingk lence indicate corresponding parts in the several views:

Figure 1 is a top plan view of the rotor setting device.

Figure 2 is a sectional elevation of the setting device.

Figure 3 is a fragmentary section on line 3-3 of Fig. 2.

Referring now more particularly to the characters of reference on the drawing, the Welder .for which'the setting device is designed compries a fixed stator I which includes a horizontal U-shaped laminated core 2 having upstanding legs 3. A rotor 4 is disposed above the stator for rotation in a horizontal plane and about a vertical axis; the rotor including a straight laminated core 5 of substantially the same length as the core 2 of the stator.

An upstanding friction-holding ring 6 of dielectric material is iixed in connection with the stator inwardly of legs 3 and is of such height that the upper edge 'l is disposed in a plane above the upper ends of legs 3 ofthe stator core, The rotor is spaced axially from the stator a certain distance andwith axial movement oi the rotor toward the stator, the rotor core 5 will frictionally engage the upper edge 'I of ring 6 and prevent undesired rotation of the rotor.

rhe present invention pertains to the means for normally urging the rotor into frictional holding engagement with ring 6, and the means employed to release the rotor from ring 6 and rotate the same to selective positions of adjustment relative to the stator, and which of course controls the'welder output; such means comprising the following:

A vertical rod or stem 8 is rigidly secured to the stator core centrally between the legs 3, such rod being of a height extending upwardly to a termination at a point a considerable distance above the rotor. The rotor is tted with a rigid axial sleeve 9 through which the rod 8 slidably projects with a close running llt; the sleeve terminating at its ends a considerable distance short of corresponding ends of rod 8.

A circular head IIl is rigidly secured on the upper end of rod 8, being preferably screwed on and held against rotation by an Allen-head set screw as indicated at II. A compression spring I2 surrounds the stem 8 between head I0 and a washer I3 seated on the upper end of sleeve 9; the spring I2 being under compression and thus normally urging the rotor core 5 into frictional holding engagement with the ring E, holding the rotor and stator against accidental relative rotation.

A collar I4 is secured on the upper end of sleeve 9 by set screws I5, and an elongated upstanding cylindrical housing I6, closed at its upper end, is secured at its lower end on collar I4 and not only encloses spring I2, the surrounded portion of stern 8, and head I0, but extends some distance thereabove, whereby to form an enclosed chamber Il above said head.

A transverse shaft I 8 isjournaled on the housing I5 and extends through chamber I'I above head It; there being a cam I9 fixed on shaft I8 above head l and in normal clearance relation thereto, as shown in Fig. 2. The cam I 9 is secured to shaft I8 by means of a set screw 2U which seats in a cut-out portion of the shaft, whereby to positively assure against relative rotation between the cam and shaft.

A radial operating lever 2l is formed with one end of shaft I8 exteriorly of housing I6 and eX- tends at right angles and at an upward incline from said shaft; the outer end of lever 2| being upturned and supporting a hand knob 22. The other end or" shaft I8 is formed as a pointer 23 which reads on an arcuate scale 24 fixed on the top 25 of the case of the welder and through which top the housing I6 projects.

In use, the operator places one hand on knob 22 and presses downward, which causes rotation of shaft i3 and cam I9. As the cam rotates it engages circular head l0 which, being xed on stem 3, cannot move downwardly. Consequently with such rotation of the cam the housing I6 rides upward relative to head l0, carrying with it sleeve 9 and the rotor. As a result the rotor is released from ring G and the operator, while holding down on hand knob 22, can rotate housing l until the pointer 23 reaches the point on scale 24 which indicates the desired rotor position and welder output. The operator then releases his hand from knob 22 and the action of spring I2 again locks the rotor with ring 6, where it remains until further adjustment is made.

From the foregoing description it will be readily seen that I have produced such a device as substantially fulfills the objects of the invention as set forth herein.

While this specification sets forth in detail the present and preferred construction of the device, still in practice such deviations from such detail may be resorted to as do not form a departure from the spirit of the invention, as defined by the appended claims.

Having thus described my invention what I claim as new and useful and desire to secure by Letters Patent is:

l. In an electric welder which includes a stator and rotor, the rotor being mounted for limited axial movement relative to the stator, a frictionholding element mounted in the path of axial movement of the rotor, releasable means normally urging said rotor axially into frictional holding engagement with said element, and means including a depressible hand lever` operative upon depression of the lever to release said first named means and rotate said rotor relative to the stator.

2. In an electric Welder which includes a stator and a rotor, the rotor being mounted for limited axial movement relative to the stator, a frictionholding element mounted in the path of axial movement of said rotor, releasable means normally urging said rotor axially into frictional holding engagement with said element, and manually actuated single control means operative to release and rotate said rotor; said control means including a manually depressible, springreturned hand lever.

3. In an electric Welder which includes a stator and a rotor, the rotor being mounted for limited axial movement relative to the stator, a frictionholding element mounted in the path of axial movement of said rotor, a spring normally urging said rotor into frictional holding engagement with said element, and manually actuated means including a depressible hand lever operative upon depression of said lever to release said rotor from Cal the action of the spring and to then rotate said rotor.

4. In an electric Welder which includes a stator and a rotor, the rotor being mounted for limited axial movement relative to the stator, a frictionholding element mounted in the path of axial movement of said rotor, a spring normally urging said rotor into frictional holding engagement with said element, and manually actuated means operative to release said rotor from the action of the spring and to simultaneously forcefully shift said rotor axially away from said element for rotation.

5. In an electric welder which includes a stator i and a rotor, the rotor being mounted for limited Y the element, to rotate said rotor.

6. In an electric welder which includes a stator and a rotor, the rotor being mounted for limited axial movement relative to the stator, a frictionholding element mounted in the path of axial movement of said rotor, a compression spring normally urging said rotor into frictional holding engagement with said element, and means mounted for one-hand operation arranged to compress said spring to release the rotor from the action thereof, and to then rotate the rotor.

7. In an electric welder which includes a stator, a rotor mounted for limited axial movement re1- ative thereto, a frictional holding element disposed in the path of axial movement of said rotor, releasable means normally urging the rotor into frictional holding engagement with said element, and manually actuated single control means including a depressible element operative upon depression of said element to release and rotate the rotor.

8. In an electric Welder which includes a stator, a rotor mounted for limited axial movement relative thereto, a frictional holding element disposed between the stator and rotor in the path of axial movement of the latter, an axial stern fixed on the stator and projecting axially through the rotor, a sleeve fixed on the rotor and through which the stem slidably projects, a spring urging the sleeve along the stem toward the stator whereby the rotor normally engages said element in frictional holding relation, and a one-hand lever arranged to forcefully shift the sleeve along the stem in the opposite direction whereby to release the rotor from the action of the spring and from said element and while so released to rotate the rotor relative to the stator.

9. In an electric welder which includes a stator, a rotor mounted for limited axial movement relative thereto, a frictional holding element disposed between the stator and rotor, in the path of axial movement of the latter, an axial stem fixed on the stator and projecting axially through the rotor, a sleeve fixed on the rotor and through which the stem slidably projects, a head fixed on the stem outwardly of the sleeve, a compression spring about the stem between the head and sleeve and normally urging the rotor into frictional holding engagement with said element, and manual actuated single control means between said sleeve and head operative to simultaneously compress the spring and forcefully shift the sleeve and rotor away from said element and to then rotate the rotor relative to the stator.

10. In an electric Welder which includes a stator, a rotor mounted for limited axial movement relative thereto, a frictional holding element disposed between the stator and rotor in the path of axial movement of the latter, an axial stem fixed on the stator and projecting axially through the rotor, a sleeve xed on the rotor and through which the stem slidably projects, a head fixed on the stem outwardly of the sleeve, a compression spring about the stem between the head and sleeve and normally urging the rotor into frictional holding engagement with said element, a shaft extending across the face of the head opposite the spring, a cam on the shaft adapted to engage said face with rotation of the shaft, means xed with and projecting from the sleeve alongside the head and turnably supporting said shaft, and a shaft rotating hand lever on said shaft.

l1. A structure as in claim 10 in which said shaft is substantially horizontal, the shaft rotating lever extending radially therefrom at an upward incline and a hand knob fitted on the upper end of said lever.

12. A structure as in claim 10 in which said last named means comprises a housing xed with the sleeve, said housing surrounding the spring and head and projecting some distance therebeyond; the shaft projecting through the housing in turnable relation, and the cam being mounted on the shaft within said housing.

13. In an electric Welder which includes rotor and stator members, the rotor being mounted for limited axial movement relative to the stator member, a stem projecting axially from and xed with one member, a cooperating sleeve projecting axially from and fixed with the other member, means including a yieldable connection between the stem and sleeve, normally preventing axial movement and turningof the rotor, and hand means functioning to forcefully shift the rotor in a direction torelease said connection and to then turn the rotor.

LEROY F. KINGERY. 

